Author Topic: New Script: LocalFuzzyHistogramHyperbolization  (Read 2777 times)

Offline jtalbot

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Re: New Script: LocalFuzzyHistogramHyperbolization
« Reply #30 on: 2018 January 06 22:35:51 »
Love this script!  I recently processed an Ha only version of the area around the flame nebula with the script.  I found that if the stars were removed prior to running the script, I got excellent results.  I found this easier than creating a star mask with the star exactly the right size.  I then added the stars back in.  Here is the processed version.

Best,
Jon Talbot
Clear Skies

Jon

Offline FrankW

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Re: New Script: LocalFuzzyHistogramHyperbolization
« Reply #31 on: 2018 January 09 22:22:19 »
Jon,

that' s a great image! And it's a really interesting idea how to handle the 'star problem'. Can you give a brief description how you remove and add the stars.

Cheers,
Frank

Offline RickS

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Re: New Script: LocalFuzzyHistogramHyperbolization
« Reply #32 on: 2018 January 09 23:26:33 »
I used LFHH to enhance starless Ha and Oiii data to produce this CTA 1 image in the gallery: https://pixinsight.com/forum/index.php?topic=12015.0  It's a very useful script!

There are probably quite a few posts on the forum about star removal.  Here's a recent one: https://pixinsight.com/forum/index.php?topic=11879.msg73080

Cheers,
Rick.

Offline jtalbot

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Re: New Script: LocalFuzzyHistogramHyperbolization
« Reply #33 on: 2018 January 10 16:53:24 »
Hi Frank,
I basically followed a technique similar to the link Rick posted.  My technique wasn't quite as involved, or as good, as what is in the link however it seemed to work just fine.
Again, thanks for a great script.

Best,
Jon
Clear Skies

Jon

Offline FrankW

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Re: New Script: LocalFuzzyHistogramHyperbolization
« Reply #34 on: 2018 January 12 10:19:42 »
Jon, Rick,

Thank you very much. I tried the method and I am really excited.  :D  At the moment I work on an update of the script to apply LFHH to color images and even use the algorithm for stretching linear images. I am not sure if I can include your method in the script but it is a great hint anyway.

To give you an impression how the update works, I attached one of my test images. For this image of the Pelican Nebula most of the contrast enhancement was achieved with LFHH. I hope I will finish the work in the next weeks.

Cheers,
Frank